| msg340808 - (view) |
Author: Eric Cosatto (ecosatto) |
Date: 2019-04-24 22:07 |
| I have an application with embedded python. When trying to import numpy, or any other module that was installed by pip, it fails with error 'ModuleNotFoundError("No module named ...")'. Yet, on the command line python, all works fine. The problem is not in the PATH, as only specific files (those with ..pyd extensions, e.g. .cp37-win_amd64.pyd) cannot be found. Example1: numpy import numpy >> ImportError("No module named 'numpy.core._multiarray_umath') The line which fails is: from . import multiarray The file it is trying to load: C:\Program Files\Python37\Lib\site-packages\numpy\core_multiarray_umath.cp37-win_amd64.pyd Example 2: cv2 import cv2 >> ModuleNotFoundError("No module named 'cv2.cv2'") The line which fails is: from .cv2 import * The file it is trying to load: C:\Program Files\Python37\Lib\site-packages\cv2\cv2.cp37-win_amd64.pyd |
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| msg340809 - (view) |
Author: Steve Dower (steve.dower) *  |
Date: 2019-04-24 22:19 |
| Are you sure you don't have the 32-bit version of Python and the 64-bit version of those packages? |
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| msg340810 - (view) |
Author: Eric Cosatto (ecosatto) |
Date: 2019-04-24 22:23 |
| Yes, and note that the command line python works fine. |
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| msg340811 - (view) |
Author: Steve Dower (steve.dower) * |
Date: 2019-04-24 22:39 |
| Where are you running the embedded Python from, and how have you configured it to include the packages? Is your install in Program Files from the full installer? Or have you extracted the embeddable distro there? |
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| msg340846 - (view) |
Author: Eric Cosatto (ecosatto) |
Date: 2019-04-25 15:28 |
| Hi, I have a full install of Python from the installer in: C:\Program Files\Python37 Then, I added libraries using pip. Everything works fine from the command line Python. Then, I build my C++ application with VisualStudio and link to the Python DLLs. I start Python inside my app using the usual code: Py_SetPath(...); Py_SetProgramName(...); Py_InitializeEx(0); PyRun_SimpleString("import sys"); PyRun_SimpleString("print(sys.path)"); PyRun_SimpleString("print(sys.prefix)"); PyRun_SimpleString("print(sys.executable)"); >> ['C:\\Program Files\\Python37\\DLLs', 'C:\\Program Files\\Python37\\Lib', 'C:\\Program Files\\Python37', 'C:\\Program Files\\Python37\\Lib\\site-packages'] >> C:\Program Files\Python37 >> C:\Program Files\Python37\python.exe So, everything works fine at this point. If I run the following: PyRun_SimpleString("import numpy"); >> ImportError("No module named 'numpy.core._multiarray_umath'") |
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| msg341295 - (view) |
Author: Eric Cosatto (ecosatto) |
Date: 2019-05-02 18:37 |
| Problem solved: Running the following code in the CommandLine Python and in the C++ embedded python clarified the problem: import importlib.machinery print(importlib.machinery.all_suffixes()) CommandLine Python: > ['.py', '.pyw', '.pyc', '.cp37-win_amd64.pyd', '.pyd'] C++ Embedded Python: > ['.py', '.pyw', '.pyc', '_d.cp37-win_amd64.pyd', '_d.pyd'] It shows that the Embedded python is running in Debug mode and therefore adds a _d to the suffix. Yet the numpy or pytorch installed only non-debug files. |
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| msg341296 - (view) |
Author: Eric Cosatto (ecosatto) |
Date: 2019-05-02 18:38 |
| I'm closing the issue, see my previous post. |
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